628937139 has 16 divisors (see below), whose sum is σ = 875642112. Its totient is φ = 400786848.

The previous prime is 628937131. The next prime is 628937149. The reversal of 628937139 is 931739826.

It is not a de Polignac number, because 628937139 - 2³ = 628937131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628937131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159024 + ... + 162930.

It is an arithmetic number, because the mean of its divisors is an integer number (54727632).

Almost surely, 2^628937139 is an apocalyptic number.

628937139 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

628937139 is a deficient number, since it is larger than the sum of its proper divisors (246704973).

628937139 is a wasteful number, since it uses less digits than its factorization.

628937139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6266.

The product of its digits is 489888, while the sum is 48.

The square root of 628937139 is about 25078.6191605519. The cubic root of 628937139 is about 856.7795268010.

The spelling of 628937139 in words is "six hundred twenty-eight million, nine hundred thirty-seven thousand, one hundred thirty-nine".